52021587 has 4 divisors (see below), whose sum is σ = 69362120. Its totient is φ = 34681056.

The previous prime is 52021583. The next prime is 52021609. The reversal of 52021587 is 78512025.

52021587 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 52021587 - 2² = 52021583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52021583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8670262 + ... + 8670267.

It is an arithmetic number, because the mean of its divisors is an integer number (17340530).

Almost surely, 2^52021587 is an apocalyptic number.

52021587 is a deficient number, since it is larger than the sum of its proper divisors (17340533).

52021587 is a wasteful number, since it uses less digits than its factorization.

52021587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17340532.

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 52021587 is about 7212.5991847600. The cubic root of 52021587 is about 373.3027583556.

The spelling of 52021587 in words is "fifty-two million, twenty-one thousand, five hundred eighty-seven".